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92 changes: 92 additions & 0 deletions
92
examples/fokker-planck/fokker-planck-relaxation-slowing-down-alphas.toml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| # cheap input file for a 0D2V relaxation to a collisional Maxwellian distribution with self-ion collisions and collisions with fixed Maxwellian background of cold ions and electrons. | ||
| n_ion_species = 1 | ||
| n_neutral_species = 0 | ||
| electron_physics = "boltzmann_electron_response" | ||
| evolve_moments_density = false | ||
| evolve_moments_parallel_flow = false | ||
| evolve_moments_parallel_pressure = false | ||
| evolve_moments_conservation = false | ||
| T_e = 1.0 | ||
| T_wall = 1.0 | ||
| initial_density1 = 1.0 | ||
| initial_temperature1 = 1.0 | ||
| z_IC_option1 = "sinusoid" | ||
| z_IC_density_amplitude1 = 0.0 | ||
| z_IC_density_phase1 = 0.0 | ||
| z_IC_upar_amplitude1 = 0.0 | ||
| z_IC_upar_phase1 = 0.0 | ||
| z_IC_temperature_amplitude1 = 0.0 | ||
| z_IC_temperature_phase1 = 0.0 | ||
| vpa_IC_option1 = "isotropic-beam" | ||
| vpa_IC_v01 = 1.0 | ||
| vpa_IC_vth01 = 0.1 | ||
| #vpa_IC_option1 = "directed-beam" | ||
| #vpa_IC_vpa01 = -1.5 | ||
| #vpa_IC_vperp01 = 0.0 | ||
| charge_exchange_frequency = 0.0 | ||
| ionization_frequency = 0.0 | ||
| constant_ionization_rate = false | ||
|
|
||
| z_ngrid = 1 | ||
| z_nelement = 1 | ||
| z_nelement_local = 1 | ||
| z_bc = "wall" | ||
| z_discretization = "chebyshev_pseudospectral" | ||
| r_ngrid = 1 | ||
| r_nelement = 1 | ||
| r_nelement_local = 1 | ||
| r_bc = "periodic" | ||
| r_discretization = "chebyshev_pseudospectral" | ||
| vpa_ngrid = 5 | ||
| vpa_nelement = 32 | ||
| vpa_L = 3.0 | ||
| vpa_bc = "zero" | ||
| vpa_discretization = "gausslegendre_pseudospectral" | ||
| vperp_ngrid = 5 | ||
| vperp_nelement = 16 | ||
| vperp_L = 1.5 | ||
| vperp_discretization = "gausslegendre_pseudospectral" | ||
| vperp_bc = "zero" | ||
| # Fokker-Planck operator requires the "gausslegendre_pseudospectral | ||
| # options for the vpa and vperp grids | ||
|
|
||
| [fokker_planck_collisions] | ||
| # nuii sets the normalised input C[F,F] Fokker-Planck collision frequency | ||
| nuii = 1.876334222e-3 #(1/nu_alphae, as computed from input diagnostic) | ||
| Zi = 2.0 | ||
| self_collisions = true | ||
| slowing_down_test = true | ||
| frequency_option = "manual" | ||
| use_fokker_planck = true | ||
| use_conserving_corrections = true | ||
| sd_density = 1.0 | ||
| sd_temp = 0.025 # TD/Ealpha | ||
| sd_mi = 0.5 # mD/malpha | ||
| sd_me = 0.000013616 # 0.25/1836.0 me/malpha | ||
| sd_q = 1.0 | ||
|
|
||
| [ion_source] | ||
| active=false | ||
| source_strength=0.0 | ||
| source_T=0.005 | ||
| source_n=1.0 | ||
| r_profile="constant" | ||
| r_width=1.0 | ||
| r_relative_minimum=0.0 | ||
| z_profile="gaussian" | ||
| z_width=0.1 | ||
| z_relative_minimum=0.0 | ||
| source_v0 = 1.0 | ||
| #source_type="alphas" | ||
| source_type="alphas-with-losses" | ||
| #source_type="beam-with-losses" | ||
| #source_vpa0 = 1.0 | ||
| #source_vperp0 = 1.0 | ||
| sink_strength = 0.0 | ||
| sink_vth=0.07071067811865475 | ||
|
|
||
| [timestepping] | ||
| nstep = 50000 | ||
| dt = 2.5e-4 | ||
| nwrite = 100 | ||
| nwrite_dfns = 100 |
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91 changes: 91 additions & 0 deletions
91
examples/fokker-planck/fokker-planck-source-sink-slowing-down-alphas-no-self-collisions.toml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| # cheap input file for a 0D2V relaxation to a collisional Maxwellian distribution with self-ion collisions and collisions with fixed Maxwellian background of cold ions and electrons. | ||
| n_ion_species = 1 | ||
| n_neutral_species = 0 | ||
| electron_physics = "boltzmann_electron_response" | ||
| evolve_moments_density = false | ||
| evolve_moments_parallel_flow = false | ||
| evolve_moments_parallel_pressure = false | ||
| evolve_moments_conservation = false | ||
| T_e = 1.0 | ||
| T_wall = 1.0 | ||
| initial_density1 = 1.0 | ||
| initial_temperature1 = 1.0 | ||
| z_IC_option1 = "sinusoid" | ||
| z_IC_density_amplitude1 = 0.0 | ||
| z_IC_density_phase1 = 0.0 | ||
| z_IC_upar_amplitude1 = 0.0 | ||
| z_IC_upar_phase1 = 0.0 | ||
| z_IC_temperature_amplitude1 = 0.0 | ||
| z_IC_temperature_phase1 = 0.0 | ||
| vpa_IC_option1 = "isotropic-beam" | ||
| vpa_IC_v01 = 1.0 | ||
| vpa_IC_vth01 = 0.1 | ||
| #vpa_IC_option1 = "directed-beam" | ||
| #vpa_IC_vpa01 = -1.5 | ||
| #vpa_IC_vperp01 = 0.0 | ||
| charge_exchange_frequency = 0.0 | ||
| ionization_frequency = 0.0 | ||
| constant_ionization_rate = false | ||
|
|
||
| z_ngrid = 1 | ||
| z_nelement = 1 | ||
| z_nelement_local = 1 | ||
| z_bc = "wall" | ||
| z_discretization = "chebyshev_pseudospectral" | ||
| r_ngrid = 1 | ||
| r_nelement = 1 | ||
| r_nelement_local = 1 | ||
| r_bc = "periodic" | ||
| r_discretization = "chebyshev_pseudospectral" | ||
| vpa_ngrid = 5 | ||
| vpa_nelement = 32 | ||
| vpa_L = 3.0 | ||
| vpa_bc = "zero" | ||
| vpa_discretization = "gausslegendre_pseudospectral" | ||
| vperp_ngrid = 5 | ||
| vperp_nelement = 16 | ||
| vperp_L = 1.5 | ||
| vperp_discretization = "gausslegendre_pseudospectral" | ||
| vperp_bc = "zero" | ||
| # Fokker-Planck operator requires the "gausslegendre_pseudospectral | ||
| # options for the vpa and vperp grids | ||
|
|
||
| [fokker_planck_collisions] | ||
| # nuii sets the normalised input C[F,F] Fokker-Planck collision frequency | ||
| nuii = 1.876334222e-3 #(1/nu_alphae, as computed from input diagnostic) | ||
| Zi = 2.0 | ||
| self_collisions = false | ||
| slowing_down_test = true | ||
| frequency_option = "manual" | ||
| use_fokker_planck = true | ||
| sd_density = 1.0 | ||
| sd_temp = 0.0025 # TD/Ealpha | ||
| sd_mi = 0.5 # mD/malpha | ||
| sd_me = 0.000013616 # 0.25/1836.0 me/malpha | ||
| sd_q = 1.0 | ||
|
|
||
| [ion_source] | ||
| active=true | ||
| source_strength=1.0 | ||
| source_T=0.005 | ||
| source_n=1.0 | ||
| r_profile="constant" | ||
| r_width=1.0 | ||
| r_relative_minimum=0.0 | ||
| z_profile="gaussian" | ||
| z_width=0.1 | ||
| z_relative_minimum=0.0 | ||
| source_v0 = 1.0 | ||
| #source_type="alphas" | ||
| source_type="alphas-with-losses" | ||
| #source_type="beam-with-losses" | ||
| #source_vpa0 = 1.0 | ||
| #source_vperp0 = 1.0 | ||
| sink_strength = 1.0 | ||
| sink_vth=0.07071067811865475 | ||
|
|
||
| [timestepping] | ||
| nstep = 250000 | ||
| dt = 1.0e-4 | ||
| nwrite = 500 | ||
| nwrite_dfns = 500 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| #runtime_plots = true | ||
| n_ion_species = 1 | ||
| n_neutral_species = 1 | ||
| electron_physics = "boltzmann_electron_response" | ||
| evolve_moments_density = true | ||
| evolve_moments_parallel_flow = true | ||
| evolve_moments_parallel_pressure = true | ||
| evolve_moments_conservation = true | ||
| recycling_fraction = 0.5 | ||
| T_e = 1.0 | ||
| T_wall = 0.1 | ||
| initial_density1 = 1.0 | ||
| initial_temperature1 = 1.0 | ||
| z_IC_option1 = "sinusoid" | ||
| z_IC_density_amplitude1 = 0.1 | ||
| z_IC_density_phase1 = 0.0 | ||
| z_IC_upar_amplitude1 = 1.0 | ||
| z_IC_upar_phase1 = 0.0 | ||
| z_IC_temperature_amplitude1 = 0.1 | ||
| z_IC_temperature_phase1 = 1.0 | ||
| vpa_IC_option1 = "gaussian" | ||
| vpa_IC_density_amplitude1 = 1.0 | ||
| vpa_IC_density_phase1 = 0.0 | ||
| vpa_IC_upar_amplitude1 = 0.0 | ||
| vpa_IC_upar_phase1 = 0.0 | ||
| vpa_IC_temperature_amplitude1 = 0.0 | ||
| vpa_IC_temperature_phase1 = 0.0 | ||
| initial_density2 = 1.0 | ||
| initial_temperature2 = 1.0 | ||
| z_IC_option2 = "sinusoid" | ||
| z_IC_density_amplitude2 = 0.001 | ||
| z_IC_density_phase2 = 0.0 | ||
| z_IC_upar_amplitude2 = 0.0 | ||
| z_IC_upar_phase2 = 0.0 | ||
| z_IC_temperature_amplitude2 = 0.0 | ||
| z_IC_temperature_phase2 = 0.0 | ||
| vpa_IC_option2 = "gaussian" | ||
| vpa_IC_density_amplitude2 = 1.0 | ||
| vpa_IC_density_phase2 = 0.0 | ||
| vpa_IC_upar_amplitude2 = 0.0 | ||
| vpa_IC_upar_phase2 = 0.0 | ||
| vpa_IC_temperature_amplitude2 = 0.0 | ||
| vpa_IC_temperature_phase2 = 0.0 | ||
| charge_exchange_frequency = 0.75 | ||
| ionization_frequency = 0.0 | ||
| constant_ionization_rate = false | ||
| nu_ei = 1000.0 | ||
| r_ngrid = 1 | ||
| r_nelement = 1 | ||
| z_ngrid = 17 | ||
| z_nelement = 16 | ||
| #z_nelement_local = 16 | ||
| z_bc = "periodic" | ||
| z_discretization = "chebyshev_pseudospectral" | ||
| vpa_ngrid = 6 | ||
| vpa_nelement = 31 | ||
| vpa_L = 12.0 | ||
| vpa_bc = "zero" | ||
| vpa_discretization = "chebyshev_pseudospectral" | ||
| vz_ngrid = 6 | ||
| vz_nelement = 31 | ||
| vz_L = 12.0 | ||
| vz_bc = "zero" | ||
| vz_discretization = "chebyshev_pseudospectral" | ||
|
|
||
| [timestepping] | ||
| type = "Fekete4(3)" | ||
| nstep = 1000000 | ||
| dt = 1.0e-6 | ||
| minimum_dt = 1.0e-7 | ||
| rtol = 1.0e-7 | ||
| nwrite = 10000 | ||
| nwrite_dfns = 100000 | ||
| steady_state_residual = true | ||
| converged_residual_value = 1.0e-3 | ||
|
|
||
| [nonlinear_solver] | ||
| nonlinear_max_iterations = 100 | ||
| #rtol = 1.0e-9 | ||
| #atol = 1.0e-12 | ||
|
|
||
| [ion_numerical_dissipation] | ||
| vpa_dissipation_coefficient = 1.0e0 | ||
| force_minimum_pdf_value = 0.0 | ||
|
|
||
| [neutral_numerical_dissipation] | ||
| vz_dissipation_coefficient = 1.0e-1 | ||
| force_minimum_pdf_value = 0.0 | ||
|
|
||
| [krook_collisions] | ||
| use_krook = true |
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